Sharpening machine for pencils and other styles



Feb. 9 ,1926.

- E. GRANTZOW SHARPEN ING MACHINE FOR PENCILS AND OTHER STYLES Filed March 15, 1924 2 Sheefs-Sheet 1 III'IIIIIII 4 Feb. 9 1-926. 1,572,005 E. GRANTZOW SHARPENING MACHINE FOR PENCILS ANDpTHER STYLES Filed March 13, 1924 Patented Feb. 9, 1926.

UNITED" sr T s "Emit snAN'rzow, or nansnnn, GERMANY.

sminrn'nme MACHINE non PENCILSAYND ornna STYLES.

Application filed MP.1'Cl113,"l924.. Serial No. 698,953.

To all whom it-mcay concern Be it known that. l, EMIL Gaiirrrzow, a

, citizen of the German Republic residing at Dresden, Germany, have invented certain new and useful Inrprovements in a Sharpening 'Machine' for Penci-lsand Other Styles, forwvhichl have filed an applicationin Germany on the 12th of March. .1923, and of. which the following is a specification.

This invention relates to. a sharpening machine for styleso-f'anykind which may be adjusted according to whether the point has to be more or. less sharp or blunt," means vbeing provided for removing from the sharpener points whichhave broken An embodiment of the invention is shown by way ;of example on the accompanying drawing in whichi v Fig. l is a front elevation of the complete machine.

Figs. 2, 3, 4 and 5 show each certain elements or parts of the machine.

Fig. 6 is a rear view of the completev machine.

Fig. 7 is a cross .section.

In the frame 1 of the machine a holder 2 for the collecting box for the waste material is arranged. On the machine frame 1 a cutting plate 8 is fixed by means of screws 4:. This cutting plate 3 has in its upper edge two bearings 5 and it has further an oval aperture 6 extended at the lower end by a rectangular aperture 7. The edges of the aperture 6 are curved in outward direction and are sharp so that they form cut-.

ting edges, An element 8 forms together with the cutting plate 8 the funnel into which the pencil to be sharpenedis insert-ed so that. its part to be pointed projects through the aperture 6. The element 8 is hooked with hooks 10 into the bearings 5 so that it can oscillate, a spring 11 serving for pushing the element 8 away from the plate 8. A holding claw 25 is pivotally mounted on the frame of the machine above the funnel and it has a toothed crown 26. An intermediate gear 27, the driving wheel 28 of which is mounted on a shaft 29, gears with the toothed crown 26. The shaft 29 carries further a handle 80 and a starshaped knife 9.

In guides 12 on the machine frame a bowshaped wire 18 is mounted so that it can be moved in longitudinal direction the curved part of the wire being bent slightly back. One end of wire 18 is bent to form an eye 14- the other end lfrbeingslightly curved. The two arms'o-f the bow-shaped w "e are connected with one another by a transverse wire 16, .a spiral spring being wound aroundone arm of the wire 131between the transversewire 16 and the guide This spring 17 presses the bow-shaped wire 18 .in inward direction so that the cui'vecl.,part 15 ofthe wire presses the element 8 against plate 3. A two-armed lever 19 pivotally mounted on a pin 18 of the-machine frame has a short longitudinal slit 20 n its inner arm, a stud 21 of an angular element 22 engaging with 1111381113 20. The

angular element 22 is' movably mounted in dove-tailed guides 23 on the rear side of the machine frame and it is braked by the action of a blade spring 24. The upper arm of the angular element engages with the aperture 7 of the cutting plate 8 and serves to limit the insertion of the pencil. The pencil is inserted into the holding claw so that it projects into the funnel 8, 8 and its front end protrudes from the aperture 6. When the shaft 29 is being rotated by means of the handle 30 the toothed wheel 28 and the starshaped knife 9 are also rotated. The bolding claw 25 is rotated from the toothed wheel 28 through the intermediary of the gear 27. The blades of the starshaped knife 9 slide along the edges of the aperture and sharpen the part of the pencil which protrudes from the aperture. The upper arm of the angular element 29. forms thus a gauge for the shape of the point; the higher this angular element stands, the? shortor or blunter becomes the point and the deeper it stands the longer and sharper becomes the point. .The angular element 22 is adjusted with the aid of the two-armed lever 19 and it is secured in its adjusted position by the action of the spring. 24:.

When a point breaks off at the sharpening the bow-shaped wire 13 has to be pulled in oval aperture extended at the lower end by a rectangular aperture and ot a platelike clement oscillably mounted on said cutting plate, means for securely holding said oscillahle element in contact with said cutting plate, a spring tor making this oscillahle element oscillate away from said cutting plate when the securing means are rendered inoperative, an angular element below said funnel serving as gauge for the point to he produced, and means for adjusting this ange element in its position.

A sharpening machine for pencils or styles comprising in combination a guide tunnel for the pencil to he sharpened composed of a stationary cutting plate having an oval aperture extended at the lower end by a rectangular aperture and of a platelike elen'icnt oscillably mounted on said cutting plate, a bow-shaped spring controlled wire for securely holding said ocillable element in contact with said cutting plate, a spring for making this oscillable element oscillate away from said cutting plate when the securing means are rendered inoperative, an angular elementbelow said tunnel serving as gauge for the point to he produced, and means for adjusting this gauge element in its position.

3. A sharpeningmachine for pencils or styles comprising in combination a guide tunnel for the pencil to he sharpened com posed of a stationary cutting plate having an oval aperture extended at the lower end by a rectangular aperture and of a )latelike element oscillal'ily mounted on said cutting plate, a bow-shaped spring: controlled wire for securely holding said oscillable element in contact; with said cut-ting plate, a spring for making this oscillable clement oscillate awa "from said cutting plate when the securing means are rendered inoperative, an angular clement below said tunnel serving as gauge for the point to be produced, a two-armed lever for regulating the position of this gauge element, and a spring stronger than that which controls said howshaped wire for securing the same in the workin position.

In testimony whereof I atlix my signature.

EMlL lRAN'lZOW. 

